I've voted for Broad Stand because that it what I have used on my unsuccessful (so far) attempts - but I agree it depends on conditions and circumstances on the day. The last time I went this way on an anticlockwise attempt we were delayed by another BG party coming the other way and went from being comfortably up on schedule to being down - as well as having got cold waiting. If we had been five minutes earlier we might have missed them but 'congestion' here could be a reason for choosing Foxes Tarn instead?